At least 30 Palestinians were wounded early Friday by an explosion of fireworks when they were celebrating a wedding ceremony in a small town near the West Bank city of Ramallah, witnesses and medics said.

Medics at a Ramallah hospital said 30 people were brought to the hospital with various injuries, adding that four of them were in serious conditions.

Witnesses said the explosion occurred suddenly while some relatives and families were celebrating and dancing during the wedding ceremony in a wedding hall in the town of Termes'aya, north of Ramallah.

The police said the explosion was caused when some children and young men were using big amounts of fireworks at the entrance of the wedding hall, where crowds of people were celebrating. The incident is under investigation.